DRV8881, 2.5 A Stepper Motor Drivers

DRV8881, 2.5 A Stepper Motor Drivers

Texas Instruments' DRV8881 are bipolar stepper or brushed-DC motor drivers for industrial applications. The device output stage consists of two N-channel power MOSFET H-bridge drivers. The DRV8881 are capable of driving up to 2.5 A peak current or 1.4 ARMS current per H-bridge (with proper PCB ground plane for thermal dissipation and at 24 V and TA = 25°C).

AutoTune™ automatically tunes motors for optimal current-regulation performance and compensates for motor variation and aging effects. AutoTune is available on the DRV8881E. Additionally, slow, fast, and mixed decay modes are available.

The PH/EN (DRV8881E) or PWM (DRV8881P) pins provide a simple control interface. An internal sense amplifier allows for adjustable current control. A low-power sleep mode is provided for very-low quiescent current standby using a dedicated nSLEEP pin.

Internal protection functions are provided for under-voltage, charge pump faults, over-current, short circuits, and over-temperature. Fault conditions are indicated by an nFAULT pin.

Features
  • Dual H-bridge motor driver
    • Bipolar stepper motor driver
    • Single or dual brushed-DC motor driver
  • 6.5 V to 45 V operating supply voltage range
  • Two control interface options
    • PHASE/ENABLE (DRV8881E)
    • PWM (DRV8881P)
  • Multiple decay modes to support any motor
    • AutoTune (DRV8881E only)
    • Mixed decay
    • Slow decay
    • Fast decay
  • Adaptive blanking time for smooth motion
  • Parallel mode operation (DRV8881P only)
  • Configurable off-time PWM chopping
    • 10 µs, 20 µs, or 30 µs off-time
  • 3.3 V, 10 mA LDO regulator
  • Low-current sleep mode (28 µA)
  • Small package and footprint
    • 28 HTSSOP (PowerPAD)
    • 28 WQFN (PowerPAD)
  • Protection features
    • VM under-voltage lockout (UVLO)
    • Charge pump under-voltage (CPUV)
    • Over-current protection (OCP)
    • Automatic OCP retry
    • Thermal shutdown (TSD)
    • Fault condition indication pin (nFAULT)
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